Haskell JSON Web Token (JWT)

JSON Web Token (JWT) is a compact URL-safe means of representing claims to be transferred
between two parties. The claims in a JWT are encoded as a JavaScript Object Notation (JSON)
object that is used as the payload of a JSON Web Signature (JWS) structure or as the plaintext
of a JSON Web Encryption (JWE) structure, enabling the claims to be digitally signed or MACed
and/or encrypted.